CN101953007A

CN101953007A - Fuel cell and method of manufacture thereof

Info

Publication number: CN101953007A
Application number: CN2009801062271A
Authority: CN
Inventors: 杉本正和; 矢野雅也
Original assignee: Aquafairy Corp
Current assignee: Harima Chemical Inc
Priority date: 2008-05-26
Filing date: 2009-05-20
Publication date: 2011-01-19
Anticipated expiration: 2029-05-20
Also published as: KR20100114550A; TWI495185B; WO2009145090A1; CN101953007B; EP2290734A4; US9455452B2; US20110091792A1; TW200950199A; KR101027098B1; EP2290734A1

Abstract

Disclosed are a fuel cell and method of manufacture thereof with which, although the cell has a simple structure, the contact pressure of the electrode layer and metal layer etc. can be increased and the cell output can be improved. There are provided a solid polymer electrolyte layer (1), a first electrode layer (2) and second electrode layer (3) arranged on both sides of this solid polymer electrolyte layer (1), and a first conductive layer (4) and second conductive layer (5) respectively arranged further on the outside of these electrode layers (2, 3). These layers (1 to 5) are joined as a single piece by an insertion-moulded resin moulding (6).

Description

Fuel cell and manufacture method thereof

Technical field

Each layer that the present invention relates to constitute fuel cell utilizes integrated fuel cell that forms of resin and manufacture method thereof, especially can be used as used fuel cell in the mobile apparatus (mobile machine, portable machine) etc.

Background technology

Along with the development of in recent years IT, most of power supply of mobile apparatus such as mobile phone, notebook personal computer, digital camera all uses lithium rechargeable battery.But, along with the multifunction of these mobile apparatus, the tendency that has power consumption to increase gradually, thereby for as its power supply with or the charging be used for talking clearly clean and efficiently fuel cell extraordinarily pay close attention to.

As the small-sized light-duty fuel cell of this kind, known have patent documentation 1 a described fuel cell for example described as follows, promptly, possess tabular solid macromolecule electrolyte, be disposed at the anode side electrode plate of one side, the cathode side battery lead plate that is disposed at opposite side, the anode-side metallic plate in the outside that is disposed at the anode side electrode plate and the cathode side metallic plate that is disposed at the outside of cathode side battery lead plate, by the peripheral part folder of these metallic plates is carried out crimping and with its sealing across insulating material.But, in the sealing that utilizes crimping of metallic plate, exist complex proceduresization, also need the such problem of precision for the THICKNESS CONTROL of bead portion.

So, for sealing process is simplified, in following patent documentation 2, following fuel cell is proposed, it possesses tabular solid macromolecule electrolyte, battery lead plate and metallic plate same as described above, using epoxy is encapsulants such as resin, on one side folder across insulating material, on one side only with the peripheral edge margin sealing of the metallic plate of both sides.

In addition, in following patent documentation 3, propose following fuel battery cell member, it possesses tabular solid macromolecule electrolyte, is located at the battery lead plate of its both sides (catalyst layer+conductivity porous body), and is integrated with using through the resin frame of insert moulding around these layers.In this invention, the conductive member (connecting elements 18 etc.) that is used for that electricity is sent to the outside is disposed at the outside of resin, contacts with the conductivity porous body with seldom area, and conductive member is not covered by resin.

Patent documentation 1: TOHKEMY 2005-150008 communique

Patent documentation 2: Japanese Utility Model is registered communique No. 3115434

Patent documentation 3: TOHKEMY 2005-11624 communique

Summary of the invention

But, in the fuel cell of patent documentation 2, owing to be only with the structure of the peripheral edge margin sealing of the metallic plate of both sides, so the metallic plate of both sides and the pressure of the contact-making surface of inboard battery lead plate has the tendency of reduction, and this causes the problems such as output reduction of battery with regard to forming cell resistance.In addition, even under the state that the metallic plate with both sides pressurizes peripheral edge margin is sealed during fabrication, the pressure of contact-making surface also has the tendency that reduces at leisure.In addition, owing to need between metallic plate, press from both sides and establish insulating material, therefore also exist become complicated, member of manufacturing process to become problem how.

In addition, in the fuel battery cell member of patent documentation 3, though because carry out insert moulding, thereby be simple structure method for making, yet owing to be only will utilize the fixing structure of resin frame on every side, therefore be difficult to electricity is sent effectively to the outside.That is to say, in the sending of electricity, need make conductive member contact conductivity porous body, yet dispose in the structure of conductive member in the outside of resin utilizing resin frame only will fix on every side, conductive member is contacted with enough pressure with battery lead plate, and this causes the problems such as output reduction of battery with regard to forming cell resistance.

So, the objective of the invention is to, fuel cell and method for making thereof are provided, though be simple structure, the contact pressure of electrode layer and metal level etc. can be improved, improve battery output.

Above-mentioned purpose can utilize the present invention to reach as followsly.

Promptly, fuel cell of the present invention is characterised in that, first conductive layer and second conductive layer that possess the solid macromolecule electrolyte layer, be located at first electrode layer and two electrode layers of these solid macromolecule electrolyte layer both sides and be disposed at the more lateral of these electrode layers are respectively used through the resin-formed body of insert moulding these layers integrated.

According to fuel cell of the present invention, since with solid macromolecule electrolyte layer, electrode layer and conductive layer with use they to have carried out the resin-formed body of insert moulding integrated, therefore can keep conductive layer and improve contact pressure with electrode layer with resin-formed body, thereby can reduce contact resistance and improve battery output.That is to say, though be to use each layer to carry out the simple structure of insert moulding, the high fuel cell of battery output can be made.And, when carrying out insert moulding, utilize the injection pressure of resin, pressurize from both sides with first conductive layer and second conductive layer, and pressurize separately by protuberance with the inner face of being located at mould, then can further improve the contact pressure of conductive layer and electrode layer.In when generating,,, just can utilize reaction in each electrode and the ionic conduction in the solid macromolecule electrolyte to generate electricity to first electrode layer and the second electrode lay fueling and oxygen etc. for example by via perforate, the stream be located in the resin-formed body.

That is to say that among the present invention, preferred above-mentioned resin-formed body has the supply unit that is used for to first electrode layer and the second electrode lay supply gas or liquid.As institute's gas supplied, can enumerate oxygen-containing gass such as fuel gas, air such as hydrogen etc., can enumerate methyl alcohol etc. as liquid.

In the above description, preferred above-mentioned first conductive layer constitutes the first metal layer of the exposed division that the above-mentioned first electrode layer part exposes by having, and above-mentioned second conductive layer constitutes second metal level of the exposed division that above-mentioned the second electrode lay part exposes by having.As conductive layer, also can use material with gas-premeable etc., yet, just can be situated between by exposed division to electrode layer supply gas or liquid by having exposed division.In addition,, compare, can realize sending of big electric current with other material by using metal level.

At this moment, the supply unit of preferred above-mentioned resin-formed body is the perforate of being located at the position corresponding with the exposed division of the above-mentioned the first metal layer or second metal level.Constitute according to this, owing to be provided with the perforate of resin-formed body in the position corresponding, therefore can be situated between by this perforate and exposed division to electrode layer supply gas or liquid, thereby can generate electricity more efficiently with the exposed division of metal level.

In addition, preferably between the perforate of above-mentioned resin-formed body and above-mentioned first electrode layer or the second electrode lay folder establish porous layer.Like this, just can be in the supply of carrying out gas or liquid, prevent the deterioration of the electrode layer that causes by adhering to of dust etc.

In addition, preferably with above-mentioned fuel cell as element cell, a plurality of these element cells are integrated with above-mentioned resin-formed body.In addition, preferred a plurality of element cell and being located in the identical face.For example, just can improve output voltage, thereby can be used as the fuel cell that incorporate battery obtains high output voltage by connecting between the element cell.

In addition, preferably have the connecting portion that is electrically connected between the conductive layer with above-mentioned a plurality of element cells, this connecting portion is integrated with above-mentioned resin-formed body.According to this fuel cell, owing to utilize connecting portion to be electrically connected between the element cell, utilize insert moulding integrated with resin-formed body, the structure, the operation that therefore are used for the connection between the element cell just become simply, form the good fuel cell of reliability, durability of connecting portion.

On the other hand, the manufacture method of fuel cell of the present invention is characterised in that, comprises following operation: solid macromolecule electrolyte layer, first electrode layer that is disposed at its both sides and the second electrode lay and first conductive layer in the outside and the sandwich of second conductive layer that are disposed at them are disposed at operation in the mould; And by injecting resin in this mould, and moulding is with the operation of the incorporate resin-formed body of above-mentioned sandwich.

Manufacture method according to fuel cell of the present invention, owing to use the sandwich of solid macromolecule electrolyte layer, electrode layer and conductive layer, integrated with resin-formed body through insert moulding, therefore can keep conductive layer and improve contact pressure with electrode layer with resin-formed body, thereby can reduce contact resistance and improve battery output.That is to say, though be to use each layer to carry out the so simple structure of insert moulding, method for making, the high fuel cell of battery output can be obtained.

As the manufacture method of fuel cell of the present invention, preferably include following operation: with solid macromolecule electrolyte layer, first electrode layer that is disposed at its both sides and the second electrode lay and be disposed at their outside and have the first metal layer that makes the exposed division that above-mentioned first electrode layer and the second electrode lay part expose and the sandwich of second metal level is disposed at operation in the mould; And with above-mentioned the first metal layer and second metal level under the state of both sides pressurization, in this mould, inject resin, thereby forming device is useful on to the supply unit of first electrode layer and the second electrode lay supply gas or liquid and with the operation of the incorporate resin-formed body of above-mentioned sandwich.

According to this manufacture method, the first metal layer and second metal level have the exposed division that first electrode layer and the second electrode lay are exposed, this sandwich is disposed in the mould and injects resin, forming device is useful on the resin-formed body to the supply unit of electrode layer supply gas or liquid.Can be via this supply unit to electrode layer fueling and oxygen etc., can utilize reaction in each electrode and the ionic conduction in the solid macromolecule electrolyte to generate electricity.At this moment, because above-mentioned the first metal layer and second metal level are being carried out insert moulding under the state of both sides pressurization, so the pressure of the metal level of both sides when contact with electrode layer becomes greatly, and cell resistance diminishes and the output raising of battery.

In the above description, the inner face of the mold component of preferably having cut apart in that above-mentioned mould is made segmenting structure is provided with protuberance, makes this protuberance be crimped on the above-mentioned the first metal layer or second metal level, is injecting resin under this state in above-mentioned mould.Under this situation, because under the protuberance of the inner face that utilizes mold component state, seal and integrated, so the pressure of the metal level of both sides when contacting with electrode layer becomes big more reliably by resin with the first metal layer or the pressurization of second metal level.

In addition, preferably a plurality of perforates are set, in the above-mentioned mold component of having cut apart, a plurality of protuberances with upper surface more bigger than above-mentioned perforate are set respectively in the position corresponding with above-mentioned a plurality of perforates on the surface of the above-mentioned the first metal layer or second metal level.Under this situation, can utilize the protuberance of the inner face of mold component,, just can improve the contact pressure of metal level and electrode layer thus pressurization around the perforate of metal level.In addition, by simultaneously the exposed division of metal level being stopped up with protuberance, just can prevent to be covered, and first electrode layer or the second electrode lay are exposed from exposed division by resin.

In addition, preferably in the operation that above-mentioned sandwich is disposed in the mould, use a plurality of above-mentioned sandwichs, with these sandwichs under the state that is electrically connected respectively and be located in the mould.According to this manufacture method, for example, just can improve output voltage by connecting between the sandwich, can be used as the fuel cell that incorporate battery is made high output voltage, can also improve manufacturing efficient.

In addition, preferably under the state that utilizes connecting portion to be electrically connected between the conductive layer with arbitrary sandwich and other sandwich, a plurality of above-mentioned sandwichs are disposed in the mould.Manufacture method according to this fuel cell, utilize connecting portion to be electrically connected between the conductive layer owing to the sandwich that will constitute element cell, utilize insert moulding integrated with resin-formed body, therefore the structure, the operation that are used for the connection between the element cell will become simply, can make the good fuel cell of reliability, durability of connecting portion.

Description of drawings

Fig. 1 is the figure of an example of expression fuel cell of the present invention, (a) is vertical view, (b) is main pseudosection, (c) is upward view.

Fig. 2 is the main pseudosection of an example of the manufacture method of expression fuel cell of the present invention.

Fig. 3 is the figure of other examples of expression fuel cell of the present invention, (a) is stereogram, (b) is vertical view, (c) is the stereogram of the portion of indicating.

Fig. 4 is the stereogram of other examples of the manufacture method of expression fuel cell of the present invention.

Fig. 5 is the main pseudosection of other examples of expression fuel cell of the present invention.

Fig. 6 is the curve chart that the output voltage of the fuel cell of expression embodiment 1 grade changes.

Fig. 7 is the figure of other examples of expression fuel cell of the present invention, (a) is vertical view, (b) is main pseudosection.

Fig. 8 is the figure of other execution modes of expression fuel cell of the present invention, (a) is vertical view, (b) be its I-I to pseudosection, be that its II-II is to pseudosection (c).

Embodiment

[first execution mode]

Use accompanying drawing that the preferred implementation of fuel cell of the present invention is described.Fig. 1 is the figure of an example of expression fuel cell of the present invention, (a) is vertical view, (b) is main pseudosection, (c) is upward view.

Fuel cell of the present invention possesses as shown in Figure 1: solid macromolecule electrolyte layer 1, first electrode layer 2 of being located at these solid macromolecule electrolyte layer 1 both sides and the second electrode lay 3 and first conductive layer and second conductive layer that are disposed at the more lateral of these

electrode layers

2,3 respectively.In the present embodiment, provide first conductive layer and second conductive layer by having the first metal layer 4 that makes the exposed division that first electrode layer 2 and the second electrode lay 3 parts expose and the example that second metal level 5 constitutes.

And, as the material of conductive layer, can enumerate metal, electroconductive polymer, conducting rubber, conducting fibre, conductivity paste, conductive coating paint etc.

As solid macromolecule electrolyte layer 1, so long as used material in the fuel cell of solid macromolecule membranous type in the past, no matter be which kind of can, yet consider from the stability of chemistry and the aspect of conductivity, preferably use by the cation-exchange membrane of making as the sulfonic perfluorocarbon polymer of having of super acids.As this kind cation-exchange membrane, preferably use Nafion (registered trade mark).In addition, for example also can be made the perforated membrane impregnation of making above-mentioned Nafion, other the material of ionic conductivity material by fluororesin such as polytetrafluoroethylene; On the perforated membrane of making by vistanexes such as polyethylene, polypropylene, nonwoven fabrics, supported the material of above-mentioned Nafion, other ionic conductivity materials.

The thickness of solid macromolecule electrolyte layer 1 is thin more, and is just effective more for the slimming of integral body, yet if consider ionic conduction function, intensity, disposal etc., then can use 10～300 μ m, preferred 25～50 μ m.

No matter

electrode layer

2,3 is so long as at the material of the electrode reaction of the near surface generation anode-side of solid macromolecule electrolyte layer 1 and cathode side, be which kind of can then.Wherein, can preferably use following material, that is, in the effect of performance as gas diffusion layers, when carrying out the supply discharge of fuel gas, fuel fluid, oxidizing gas and water vapour, the effect of performance current

collection.As electrode layer

2,3, can use identical or different material, preferably in its base material, support catalyst with electrode catalyst effect.Preferably catalyst is supported at least the inner face side that contacts in solid macromolecule electrolyte layer 1.

As the electrode base material of

electrode layer

2,3, for example can use the conductivity porous materials such as aggregate of cellulosic carbon such as carbon paper, carbon fiber nonwoven fabric, electroconductive polymer fiber.In addition, also can use on solid macromolecule electrolyte layer 1 direct attached catalyst or support the

electrode layer

2,3 that is attached in electroconductive particle such as carbon black on the solid macromolecule electrolyte layer 1.

In general, electrode layer the 2, the 3rd adds lyophobic dust such as fluororesin and makes in this kind conductivity porous material, under catalyst-loaded situation, catalyst such as platinum particulate are mixed with lyophobic dusts such as fluororesin, to mixed solvent wherein, make pasty state or the China ink aqueous after, it is coated and should form with the one side of the opposed electrode base material of solid polyelectrolyte membrane.

In general,

electrode layer

2,3, solid macromolecule electrolyte layer 1 adopt and reducing gas and the corresponding design of oxidizing gas supplied with to fuel cell.Among the present invention, preferably use air, and use hydrogen as reducing gas as oxidizing gas.And, also can replace reducing gas and use fuel fluid such as methyl alcohol.

For example, under the situation of using hydrogen and air, the second electrode lay 3 of the cathode side of a side of being supplied with naturally at air is (in this specification, anode-side is assumed to first electrode layer, cathode side is assumed to the second electrode lay) in, produce oxygen and hydrionic reaction and generate water, the therefore preferred employing design corresponding with this electrode reaction.Particularly under the operating condition of low working temperature, high current density and high gas effciency, particularly in the air pole that generates water, cause obstruction (overflow flooding) phenomenon of the electrode porous body that the condensation by water vapour causes easily.So in order to obtain the stability characteristic (quality) of fuel cell in long-time, effectively way is to guarantee the hydrophobicity of electrode according to the mode that does not cause overflow phenomena.

As catalyst, can use at least a metal or its oxide that are selected from platinum, palladium, ruthenium, rhodium, silver, nickel, iron, copper, cobalt and the molybdenum, also can use the material that in carbon black etc., has supported these catalyst in advance.

The thickness of

electrode layer

2,3 is thin more, and is just effective more for the slimming of integral body, yet if consider electrode reaction, intensity, disposal etc., preferred 1～500 μ m, more preferably 100～300 μ m.That

electrode layer

2,3 and solid macromolecule electrolyte layer 1 both can carry out in advance was bonding, welding or coating form etc. and stacked integrated, also can be laminated configuration merely.This kind duplexer also can be used as film/assembly of electrode (Membrane Electrode Assembly:MEA) and obtains, and also can use this material.

Among the present invention, though the profile of first electrode layer 2 and the second electrode lay 3 can be littler than the profile of solid macromolecule electrolyte layer 1, yet the profile of preferred first electrode layer 2 and the second electrode lay 3 is identical with the profile of solid macromolecule electrolyte layer 1.If the profile of electrode layer is identical with the profile of solid macromolecule electrolyte layer 1, then can the stamping-out battery lead plate and the duplexer of solid macromolecule electrolyte, make the solid macromolecule electrolyte assembly of electrode, can utilize and produce the cost that effect reduces this conjugant in batches.In addition, by being formed in the inboard, just the periphery of electrode layer and the periphery of solid macromolecule electrolyte layer can be sealed more reliably with peripheral shape that the periphery of electrode layer is compared metal level.

At the first metal layer 4 of the surface configuration anode-side of anode side electrode layer 2, at second metal level 5 (in this specification, anode-side is assumed to the first metal layer, cathode side is assumed to second metal level) of the surface configuration cathode side of cathode side electrode layer 3.The first metal layer 4 has the exposed division that first electrode layer, 2 parts are exposed, and in the present embodiment, is given in the example that is provided with the perforate 4a that is used for fueling gas etc. in the anode-side metal level 4.

The exposed division of the first metal layer 4 is so long as can expose anode side electrode layer 2, and then no matter its number, shape, size, formation position etc. are how can.The perforate 4a of anode-side metal level 4 for example can be regularly or a plurality of circular holes, slit etc. is set randomly, perhaps utilizes wire netting that perforate 4a is set, and perhaps the first metal layer 4 is made as the such shape of comb poles and anode side electrode layer 2 is exposed.The ratio (percent opening) that adds up to for the area of perforate 4a part, preferred 10～50% from considering with the viewpoints such as balance of the supply area of the contact area of electrode and gas, more preferably 15～30%.

In addition, second metal level 5 of cathode side has the exposed division that the second electrode lay 3 parts are exposed, and in the present embodiment, is given in the example of a plurality of perforate 5a that are provided with the oxygen (natural inflow) that is used for air supply in the cathode side metal level 5.Perforate 5a is so long as can expose cathode side electrode layer 3, and then no matter its number, shape, size, formation position etc. are how can.The perforate 5a of cathode side metal level 5 for example can be regularly or a plurality of circular holes, slit etc. is set randomly, perhaps utilizes wire netting that perforate 5a is set, and perhaps second metal level 5 is made as the such shape of comb poles and cathode side electrode layer 3 is exposed.The ratio (percent opening) that adds up to for the area of perforate 5a part, preferred 10～50% from considering with the viewpoints such as balance of the supply area of the contact area of electrode and gas, more preferably 15～30%.

As

metallic plate

4,5, so long as electrode reaction is not had dysgenic material, no matter be which kind of metal can use then, for example can enumerate corrosion resistant plate, nickel, copper, copper alloy etc.But, consider preferably copper, copper alloy, corrosion resistant plate etc. from conductivity, cost, giving property of shape, the viewpoints such as intensity that are used to pressurize.In addition, also can implement gold-plated grade for metal coating to above-mentioned metal.

And the thickness of

metallic plate

4,5 is thin more, and is just effective more to the slimming of integral body, yet if consider conductivity, cost, weight, giving property of shape, the intensity that is used to pressurize etc., preferred 10～1000 μ m, more preferably 50～200 μ m.

Among the present invention, from

electrode layer

2,3 and

metal level

4,5 are considered with the incorporate viewpoint of resin well, preferably compare with the periphery of first electrode layer 2, the peripheral shape of the first metal layer 4 is formed in the inboard, preferably compare, the peripheral shape of second metal level 5 is formed in the inboard with the periphery of the second electrode lay 3.And, also can compare with the periphery of first electrode layer 2, the peripheral shape of the first metal layer 4 is formed in the outside, can also compare with the periphery of the second electrode lay 3, the peripheral shape of second metal level 5 is formed in the outside.

Metal level 4 and metal level 5 can be by exposing at least a portion from resin, and this part is transferred out to the outside as electrode.Thus, the portion of terminal that metal level 4 and metal level 5 parts is exposed with respect to resin-formed body 6 can be set, and in the present invention, preferred metal layers 4 and metal level 5 possess protuberance 4b, the 5b of the electrode that becomes element cell, and it stretches out to the outside from resin-formed body 6.This

protuberance

4b, 5b can also be used for when carrying out insert moulding, and (sandwich L) such as

metal levels

4,5 remained in the mould.

The formation of the formation of metal level 4 and metal level 5 or opening 5a, 4a can utilize punch process (processing of punching press stamping-out) to carry out.In addition, in protuberance 4b, the 5b of metal level 4 and metal level 5,, also can through hole be set by the part of insert moulding for making resin flow, the good purpose of adaptation.In addition, in order to connect well, to fix, also can through hole be set in the part of exposing of

protuberance

4b, 5b.

Fuel cell of the present invention as shown in Figure 1, and aforesaid each layer 1～5 usefulness is integrated through the resin-formed body 6 of insert moulding.Among the present invention, preferably first conductive layer and/or second conductive layer whole or roughly whole are covered with resin-formed body 6, more preferably first conductive layer and second conductive layer whole or roughly whole are covered with resin-formed body 6.Under this situation, as described later, resin-formed body 6 can comprise preform partly.Resin-formed body 6 preferably has the supply unit that is used for to first electrode layer 2 and the second electrode lay 3 supply gas or liquid, and this supply unit is preferably the perforate 6a that is located at the position corresponding with the exposed division of the first metal layer 4 or second metal level 5.

In the present embodiment, provide following example, that is, and according to the mode that above-mentioned first electrode layer 2 and the second electrode lay 3 are exposed from perforate 6a, with above-mentioned the first metal layer 4 and second metal level 5 under the state of both sides pressurization, utilize resin-formed body 6 to carry out insert moulding and integrated.

Among the present invention, the size of the perforate 4a, the 5a that are equivalent to exposed division of

metal level

4,5 can be bigger than the size of the perforate 6a of resin-formed body 6, also can be identical size, can also be littler.But, preferably according to the size of the exposed division that makes the first metal layer 4 and/or second metal level 5 and the big or small mode that equates substantially of perforate 6a, with resin-formed body 6 moulding.Specifically, the area of each perforate 6a be preferably each exposed division area 60～150%, more preferably 80～130%.

In the present embodiment, the size of the perforate 4a, the 5a that are equivalent to exposed division that provides

metal level

4,5 is than the example of the big slight situation of the perforate 6a of resin-formed body 6.So just can utilize the part that is equivalent to perforate 6a of resin-formed body 6 to around perforate 4a, the 5a of

metal level

4,5, (with reference to Fig. 2 (c)) pressurizes when moulding.

As the material of resin-formed body 6, can enumerate thermosetting resin, thermoplastic resin, heat-resistant resin etc., however preferred thermoplastic resin, thermosetting resin.And, as thermoplastic resin, can enumerate polycarbonate resin, ABS resin, liquid crystal polymer, polypropylene, polystyrene, acrylic resin, fluororesin, polyester, polyamide etc.As thermosetting resin, can enumerate epoxy resin, unsaturated polyester resin, phenolic resins, amino resins, polyurethane resin, silicone resin or thermoset polyimide resin etc.Wherein, viewpoints such as the resin flow in the mould, intensity, melt temperature are considered, preferred polyester, polypropylene, acrylic resin, and they can be selected according to application purpose.

As resin-formed body 6, also can use resin-elastomers such as thermoplastic elastomer (TPE), rubber.Under this situation, by in other material, also using material, just whole fuel cell can be made as flexibility with flexibility.

As the thickness of the integral body of resin-formed body 6, from the incorporate intensity of utilizing resin to realize, viewpoints such as the pressure of metal level pressurization, slimming are considered preferred 0.3～4mm, more preferably 0.5～2mm.Particularly as the thickness of the resin-formed body 6 of the part that covers metal level, from the viewpoint of the pressure of metal level pressurization is considered preferred 0.2～1.5mm, more preferably 0.3～1.0mm.

As the area of the profile of resin-formed body 6, from the incorporate intensity of utilizing resin to realize, the pressure viewpoint of metal level pressurization is considered, 101～200% of the area of the profile of preferred solid macromolecule electrolyte layer 1, more preferably 150～180%.

Fuel cell of the present invention can ground as follows fueling etc. and make it generating.For example cathode side can be made as directly to atmosphere opening, by to the fuel such as space hydrogen supply of being located at anode-side, or in being located at the space of anode-side, produce fuel such as hydrogen and generate electricity.In addition, also can anode side and/or cathode side the stream that is used to form stream be installed formed member, supply with oxygen-containing gas, fuel to this stream.Form member as stream, for example can use the plate body that is provided with flow passage groove, supply port and outlet; Member with the similar structure of barrier film of heap type fuel cell.If use the latter, then can constitute heap type fuel cell.

Aforesaid fuel cell for example can utilize manufacture method of the present invention to make.Promptly, the manufacture method of fuel cell of the present invention comprises that sandwich L with solid macromolecule electrolyte layer 1, first conductive layer that is disposed at its both sides and second conductive layer, the first metal layer 4 in the outside that is disposed at them and second metal level 5 is disposed at the operation in the mould 10 shown in Fig. 2 (a)～(d).Provide following example in the present embodiment, promptly, first conductive layer and second conductive layer are the first metal layer 4 and second metal levels 5 with exposed division (for example perforate 4a, 5a) that first electrode layer 2 and the second electrode lay 3 parts are exposed, and are disposed in the mould 10 under the state that the protuberance 11a, the 12a that this exposed division are utilized mould 10 stop up.

In addition, the manufacture method of fuel cell of the present invention comprises by inject resin in above-mentioned mould 10 and forms operation with the incorporate resin-formed body 6 of sandwich L.Provide following example in the present embodiment, promptly, be included in the first metal layer 4 and second metal level 5 under the state of both sides pressurization, by injecting resin in this mould 10, thereby forming device is useful on to the supply unit of first electrode layer 2 and the second electrode lay 3 supply gas or liquid and with the operation of the incorporate resin-formed body 6 of sandwich L.That is to say, provide and remove the example that the perforate 6a that is equivalent to above-mentioned supply unit incites somebody to action 6 coverings of almost whole sandwich L usefulness resin-formed body in addition.

At first, for example shown in Fig. 2 (a), prepare to have the following metal pattern 11 of protuberance 11a in the bottom surface.In the present embodiment, provide the example of following situation, that is, the inner face of the mold component of having cut apart in that mould 10 is made segmenting structure is provided with

protuberance

11a, 12a, makes this

protuberance

11a, 12a be crimped on the first metal layer 4 and second metal level 5.Protuberance 11a has the upper surface with the size of the perforate 4a obstruction of the first metal layer 4 of sandwich L downside, is located at the opposed position with each perforate 4a.Following metal pattern 11 has sidewall around the bottom surface, can insert along the inner face of sidewall and go up metal pattern 12.

In following metal pattern 11 (or going up metal pattern 12), be provided with the inlet 11b of resin, yet a plurality of inlet 11b also can be set.In addition, the resin flow when making moulding is good, and the little outlet of resin also can be set more than 1 place.

In addition, for protuberance 4b, the 5b that makes the first metal layer 4 and second metal level 5 exposes from resin-formed body 6 after moulding, the sidewall of following metal pattern 11 forms segmenting structure (diagram slightly).When being disposed at sandwich L in the mould 10, be located at the notch part of the rectangle of the sidewall of metal pattern 11 down, protuberance 4b, the 5b location with the first metal layer 4 and second metal level 5 forms the structure that mold component pushes this protuberance 4b,

5b.Protuberance

4b, 5b are exposed from resin-formed body 6.

Then, for example shown in Fig. 2 (b), sandwich L is disposed at down the bottom surface of metal pattern 11.At this moment, the upper surface with the protuberance 11a of bottom surface is disposed at the position that the perforate 4a of the first metal layer 4 can be stopped up.When configuration sandwich L, part or all of each layer can be by integrated, also can be not by integrated.In addition, a part not by incorporate situation under, each layer can be disposed respectively, also can side by side dispose.The formation of the sandwich L that is disposed as previously mentioned, yet when being configured, also can use preform with the part moulding in advance of the shape of final resin-formed body 6, with this preform in sandwich L is disposed at mould 10 (for example with reference to Fig. 4).

Then, for example shown in Fig. 2 (c), insert along the inner face of the sidewall of metal pattern 11 down and to go up metal pattern 12, protuberance 12a is set at the lower surface of last metal pattern 12.This protuberance 12a has the upper surface with the size of the perforate 5a obstruction of second metal level 5 of sandwich L upside, is located at the opposed position with each perforate 5a.After this, under usefulness, under the state of the protuberance 12a of the protuberance 11a of metal pattern 11 and last metal pattern 12 with

metal level

4,5 pressurizations, sandwich L is disposed in the mould 10.At this moment, protuberance 4b, the 5b of the first metal layer 4 and second metal level 5 also can dispose laterally from the inner space of mould 10.

Under this state, in mould 10, inject resin (comprising the material liquid of resin, uncured thing) at " resin ", yet because exposed division (for example perforate 4a, 5a) is stopped up by protuberance 11a and protuberance 12a, therefore shown in Fig. 2 (d), first electrode layer 2 and the second electrode lay 3 expose from perforate 6a in the formed body of gained.In addition, utilize the injection of resin, solid macromolecule electrolyte layer 1,

electrode layer

2,3, the first metal layer 4 and second metal level 5 can be utilized insert moulding and integrated.

[second execution mode]

Use accompanying drawing that other execution modes of fuel cell of the present invention are described.Fig. 8 is the figure of an example of expression fuel cell of the present invention, (a) is vertical view, (b) be its I-I to pseudosection, be that its II-II is to pseudosection (c).

Fuel cell of the present invention possesses a plurality of element cell C as shown in Figure 8, utilizes connecting portion to be electrically connected between the conductive layer with arbitrary element cell C1 and other element cell C2.In this execution mode, provide first conductive layer (the first metal layer 4) of element cell C1 and the example of second conductive layer (the second metal level 5) electrical connection (series connection) of element cell C2, yet it is in parallel between in the present invention, also can conductive layer with arbitrary element cell C1 and other element cell C2.Under this situation, between first conductive layer of arbitrary element cell C1 and other element cell C2 and be electrically connected between second conductive layer.Certainly, also can be with parallel connection and tandem compound.

And, as the number of the element cell C that is connected, can set according to desired voltage or electric current, provide the example that connects 2 element cell C in this embodiment.

Each element cell C of the present invention has: solid macromolecule electrolyte layer 1, first electrode layer 2 of being located at these solid macromolecule electrolyte layer 1 both sides and the second electrode lay 3, and be disposed at first conductive layer and second conductive layer of more lateral of these

electrode layers

2,3 respectively.In this execution mode, provide first conductive layer and second conductive layer by having the first metal layer 4 that makes the exposed division that first electrode layer 2 and the second electrode lay 3 parts expose and the example that second metal level 5 constitutes.Below, the part different with first execution mode narrated, and other part is identical with the first above-mentioned execution mode.

Fuel cell of the present invention as shown in Figure 8, possesses the connecting portion J that is electrically connected between the conductive layer with arbitrary element cell C and other element cell C, and under the situation of series connection, first conductive layer of arbitrary element cell C is electrically connected with second conductive layer of other element cell C.In this execution mode, provide the example that first conductive layer (metal level 4) of one among the adjacent said units battery C, another person's second conductive layer (metal level 5) and metal level that connecting portion J is made of continuous metallic plate are formed.

In this execution mode, the connecting portion J-shaped becomes has the rectangle of end difference in central authorities, however the shape of connecting portion J no matter be which kind of can, in addition, also can be partly to the outstanding shape in the outside of resin-formed body 6.In insert moulding, need be in mould with the sandwich positioning and fixing, preferred connecting portion J is partly to the outstanding shape in the outside of resin-formed body 6 when positioning and fixing.

Connecting portion J is the part of connecting between the adjacent element cell C, forms and the first metal layer 4 and second metal level, 5 incorporate metallic plates.Can use this metallic plate and replace disposing independently the method for the first metal layer 4 and second metal level 5,, just can make the fuel cell that element cell C is connected as long as thus this metallic plate is disposed in the mould.

Metallic plate is shown in Fig. 8 (c), and the first metal layer 4 that is adjacent to dispose in the face that is parallel to each other and second metal level 5 extend respectively laterally in identical face and be provided with, and utilizes end difference and links integrated.This species stage portion can process and makes by metallic plate being carried out sheet metal.

Fuel cell of the present invention possesses aforesaid element cell C and connecting portion J is utilized insert moulding and incorporate resin-formed body 6 as shown in Figure 8.Resin-formed body 6 preferably has the supply unit that is used for to first electrode layer 2 and the second electrode lay 3 supply gas or liquid, and this supply unit is preferably the perforate 6a that is located at the position corresponding with the exposed division of the first metal layer 4 or second metal level 5.

Aforesaid fuel cell for example can utilize manufacture method of the present invention to make.Promptly, the manufacture method of fuel cell of the present invention is shown in Fig. 2 (a)～(d), comprise following operation, promptly, to a plurality ofly comprise solid macromolecule electrolyte layer 1, be disposed at first electrode layer 2 and the second electrode lay 3 of its both sides and be disposed at their first conductive layer in the outside and the sandwich L of second conductive layer, under the state that is electrically connected between the conductive layer that utilizes connecting portion with arbitrary sandwich L and other sandwich L, be disposed in the mould 10.Under the situation of series connection, first conductive layer of among the adjacent sandwich L one is connected with another person's second conductive layer, under the situation of parallel connection, first conductive layer of among the adjacent sandwich L one is connected with another person's first conductive layer, and one second conductive layer is connected with another person's second conductive layer.

Provide following example in this execution mode, promptly, first conductive layer and second conductive layer are the first metal layer 4 and second metal levels 5 with exposed division (for example perforate 4a, 5a) that first electrode layer 2 and the second electrode lay 3 parts are exposed, and are disposed in the mould 10 under the state that the protuberance 11a, the 12a that this exposed division are utilized mould 10 stop up.

For the sandwich L that constitutes element cell C, can be with it a plurality of and be located in the identical face, also can be disposed at 2 limits of L font, 2 limits of square or rectangular～4 limits, leg-of-mutton 2 limits～each limit such as 3 limits in addition.In this execution mode, provide 2 sandwich L and be located at example in the identical face.

In addition, the manufacture method of fuel cell of the present invention comprises by inject resin in above-mentioned mould 10 and forms operation with sandwich L and the incorporate resin-formed body 6 of above-mentioned connecting portion J.In this execution mode, provide the example that comprises following operation, promptly, with the first metal layer 4 and second metal level 5 under the state of both sides pressurization, by injection resin in this mould 10, thereby forming device is useful on to the supply unit of first electrode layer 2 and the second electrode lay 3 supply gas or liquid and with the incorporate resin-formed body 6 of sandwich L.That is to say, provide and remove the example that the perforate 6a that is equivalent to above-mentioned supply unit incites somebody to action 6 coverings of almost whole sandwich L usefulness resin-formed body in addition.

At first, for example shown in Fig. 2 (a), preparation has the following metal pattern 11 of protuberance 11a in the bottom surface in the formation zone of each element cell C.In this execution mode, provide the example of following situation, that is, the inner face of the mold component of having cut apart in that mould 10 is made segmenting structure is provided with

protuberance

11a, 12a, makes this

protuberance

5b.Protuberance

4b, 5b are exposed from resin-formed body 6.

Then, for example shown in Fig. 2 (b), a plurality of sandwich L are disposed at down the bottom surface of metal pattern 11.At this moment, the upper surface of protuberance 11a of bottom surface that is formed at the formation zone of each element cell C is disposed at the position that the perforate 4a of the first metal layer 4 of each sandwich L can be stopped up.

Among the present invention, first conductive layer of one among the adjacent sandwich L is disposed in the mould 10 under the state that utilizes connecting portion J to be electrically connected with another person's second conductive layer.In this execution mode, provide the example that first conductive layer (metal level 4) of one among the adjacent sandwich L, another person's second conductive layer (metal level 5) and metal level that connecting portion J is made of continuous metallic plate are formed.

When configuration sandwich L, part or all of each layer can be by integrated, also can be not by integrated.In addition, a part not by incorporate situation under, each layer can be disposed respectively, also can side by side dispose.The formation of the sandwich L that is disposed as previously mentioned, yet when being configured, also can use preform with the part moulding in advance of the shape of final resin-formed body 6, with this preform in sandwich L is disposed at mould 10 (for example with reference to Fig. 4).

Then, for example shown in Fig. 2 (c), insert along the inner face of the sidewall of metal pattern 11 down and to go up metal pattern 12, the lower surface in the zone of each element cell of formation C of last metal pattern 12 is provided with protuberance 12a.This protuberance 12a has the upper surface with the size of the perforate 5a obstruction of second metal level 5 of sandwich L upside, is located at the opposed position with each perforate 5a.After this, under usefulness, under the state of the protuberance 12a of the protuberance 11a of metal pattern 11 and last metal pattern 12 with

metal level

Under this state, in mould 10, inject resin (comprising the material liquid of resin, uncured thing) at " resin ", yet because exposed division (for example perforate 4a, 5a) is stopped up by protuberance 11a and protuberance 12a, therefore shown in Fig. 2 (d), first electrode layer 2 and the second electrode lay 3 expose from perforate 6a in the formed body of gained.In addition, utilize the injection of resin, a plurality of sandwich L that comprise solid macromolecule electrolyte layer 1,

electrode layer

Though in this embodiment, provide the example that first conductive layer of one in the adjacent said units battery, another person's second conductive layer and metal level that above-mentioned connecting portion is made of continuous metallic plate are formed, yet connecting portion of the present invention is so long as no matter the connecting portion that one first conductive layer can be electrically connected with another person's second conductive layer is which kind of can.

For example, one first conductive layer and another person's second conductive layer member with other can be electrically connected.For example, can use members such as metal wire to weld.In addition, the member that constitutes connecting portion can be electrically connected by mechanically contacting with conductive layer.For example, can contact with conductive layer, utilize resin-formed body integrated, thereby one first conductive layer is electrically connected with another person's second conductive layer by using members such as metallic plate.

Though in this embodiment, provide a plurality of element cells are disposed at example in the identical faces, yet also each element cell can be disposed three-dimensionally.For example, each element cell can be disposed at 2 limits of L font, 2 limits of square or rectangular～4 limits, leg-of-mutton 2 limits～each limit such as 3 limits.

When like this each element cell being disposed three-dimensionally, the method for three-dimensional ground moulding, the method for using the material of flexibility to make it to be out of shape after the plane earth moulding are arranged when insert moulding three-dimensionally when insert moulding.

Under the former situation, the angle that preferably will connect the metallic plate of first conductive layer, another person's second conductive layer of one in the adjacent said units battery and above-mentioned connecting portion and adjacent said units battery is warpage accordingly.For example, under the situation of 4 limit dispensing unit batteries of square (quadrangular prism), above-mentioned metallic plate is by with about 90 ° angle warpage.

Use this kind metallic plate, the sandwich that constitutes element cell is disposed at 4 limits in the mould 10 of cavity respectively with quadrangular prism, under state with each electrical connection, utilize the method for insert moulding, can produce the fuel cell that disposes element cell on 4 limits of quadrangular prism.

[other execution modes]

(1) in second execution mode, be given in comprise 2 element cells in the resin-formed body and connecting portion not to the example of the outstanding fuel cell in the outside of resin-formed body, and in the present invention, shown in Fig. 3 (a)～(c), also can in the formed body of resin, comprise the element cell more than 3.Provide following example in this execution mode, that is, use the first metal layer 4, second metal level 5 to be connected with connecting portion J and, 4 element cell C1～C4 to be connected partly to the outstanding metallic plate in the outside of resin-formed body.

The formation of each element cell C1～C4 basically as previously mentioned, yet protuberance 4b, the 5b of metal level are with different with second metal level, 5 incorporate metallic plates with the first metal layer 4.In this execution mode, because each element cell C1～C4 series connection, so protuberance 4b, the 5b of metal level only are located at element cell C1 and element cell C4.That is to say, only have the protuberance 5b of second metal level 5 of the protuberance 4b of the first metal layer 4 of element cell C1 and element cell C4.The necessity of protuberance 4b, the 5b of metal level, shape are like preceding described.

Be situated between by connecting portion J incorporate metallic plate of the first metal layer 4 and second metal level 5 is to be used for the member of connecting between the adjacent element cell C.Can use this metallic plate and replace disposing independently the method for the first metal layer 4 and second metal level 5,, just can produce the fuel cell that element cell C1～C4 is connected as long as thus this metallic plate is disposed in the mould 10.

Metallic plate is shown in Fig. 3 (c), the first metal layer 4 that is adjacent to dispose in the face that is parallel to each other and second metal level 5 have and extend prolonging of being provided with laterally respectively the 4j of portion, 5j in identical face, will prolong the 4j of portion, 5j and utilize end difference 4s and link integrated.This species stage portion can process and makes by metallic plate being carried out sheet metal.And, carrying out under the situation in parallel, for example can use between the first metal layer 4 that will in identical faces, be adjacent to dispose (or between second metal level 5) to utilize to extend prolonging of being provided with portion and link incorporate metallic plate.

(2) in the execution mode in front, provide the example that does not use preform and utilize the protuberance formation perforate of mould up and down, and in the present invention, can be as shown in Figure 4, use is pre-formed the preform 7 of perforate 6a, only utilizes the protuberance 12a of a side mould 12 to form perforate 6a.By using this kind preform 7, can be so that the location when being disposed at sandwich L in the mould 10 be easy, can be so that the formation of the perforate 6a of resin-formed body 6 be easy.And, using under the situation of preform 7, utilize it with one metal level pressurization, another person's metal level is by the protuberance pressurization of mould.

At first, shown in Fig. 4 (a), be pre-formed preform 7.Preform 7 has the perforate 7a suitable with the perforate 6a of resin-formed body 6.That is to say that this perforate 7a can keep perforate 7a in resin forming thereafter.The profile of preform 7 is not particularly limited, yet can be 6 littler than the resin-formed body behind the insert moulding, more bigger than solid macromolecule electrolyte layer 1 degree.

In addition, preform 7 preferably has and is used for the end difference 7b of the first metal layer 4 location or is used for end difference 7c with

electrode layer

2,3 and solid macromolecule electrolyte layer 1 location.In addition, the support 7d that preferably has the protuberance 5b that is used to support second metal level 5.

Then, shown in Fig. 4 (b), preform 7 is disposed in the mould (diagram slightly), then the first metal layer 4 is disposed along end difference 7b location.At this moment, the position of the perforate 4a of the first metal layer 4 is roughly consistent with the position of the perforate 7a of preform 7.

Then, shown in Fig. 4 (c)～(e),, first electrode layer 2, solid macromolecule electrolyte layer 1 and the second electrode lay 3 are located configuration successively along the end difference 7c of preform 7.At this moment, can will dispose their stacked incorporate member location in advance.At this moment, slightly more than needed by the size that makes end difference 7c, just can be when injecting resin thereafter, with the periphery of

electrode layer

2,3 and the periphery sealing of above-mentioned solid macromolecule electrolyte layer 1.

Then, shown in Fig. 4 (f), laminated configuration second metal level 5.At this moment, the protuberance 5b of second metal level 5 is supported by support 7d.In addition, the perforate 5a of second metal level 5 is configured to roughly consistent with the position of the protuberance 12a of the lower surface of being located at metal pattern 12.

Then, shown in Fig. 4 (g), inject resin in the mould after installing, make with preform 7 and resin-formed body 6 integrated fuel cell.At this moment, owing to perforate 5a is stopped up by protuberance 12a, and the perforate 7a of preform 7 is not stopped up by resin, and therefore in the formed body of gained, first electrode layer 2 and the second electrode lay 3 expose from perforate 6a.And, owing to utilize metal level 4 pressurizations of 7 pairs one of preforms, another person's metal level 5 utilizes the protuberance 12a of mould 10 pressurized, therefore with the first metal layer 4 and second metal level 5 under the state of both sides pressurization, form and utilize resin-formed body 6 and incorporate structure.

(3) in the execution mode in front, the size of the perforate that is equivalent to exposed division that provides metal level is than the big slight example of the perforate of resin, yet also can be shown in Fig. 5 (a), the size of perforate 6a that makes resin-formed body 6 slight greatly than perforate 4a, the 5a of metal level 4,5.Under this situation, because the part (for example) of the

electrode layer

2,3 that exposes from perforate 4a, 5a is utilized resin-formed body 6 sealings, therefore can utilize the bonding force of resin-formed body 6 and

electrode layer

2,3, improve the adaptation of

electrode layer

2,3 and metal level 4,5.For slight greatly than perforate 4a, 5a of the size of the perforate 6a that makes resin-formed body 6, be formed with the mould of the size of upper surface as long as use than the big slight protuberance of perforate 4a, 5a, under this protuberance and

electrode layer

2,3 state of contact, utilize the sealing of resin to get final product.

Under above-mentioned situation, around perforate 4a, the 5a of

metal level

4,5, can't utilize the part of the perforate 6a that is equivalent to resin-formed body 6 when moulding, to pressurize.Thus, shown in Fig. 5 (b), pin by the part beyond perforate 4a, the 5a of

metal level

4,5 for example being used other pressurizes when moulding, just can utilize resin-formed body 6 integrated under the state that the first metal layer 4 and second metal level 5 are pressurizeed from both sides.Under the situation of carrying out this kind pressurization, in crimping the part of pin etc. form pressurization perforate 6b.

In addition, also can be shown in Fig. 5 (c), in resin-formed body 6, be provided with and do not participate in the through hole 6c that generates electricity.This through hole 6c is following hole,, also is provided with through hole in solid macromolecule electrolyte layer 1,

electrode layer

2,3 etc. that is, by the through hole 6c littler than this hole is set, and utilizes the resin-formed body 6 around it that

electrode layer

2,3 etc. is integrated.If adopt this through hole 6c, then owing to utilize resin-formed body 6 around it that solid macromolecule electrolyte layer 1,

electrode layer

2,3 and

metal level

4,5 is integrated, therefore can improve the crimp force of

electrode layer

2,3 and

metal level

4,5.

The through hole 6c that this kind do not participate in generating electricity is provided with by the exposed division with the

electrode layer

2,3 that is used to generate electricity.In addition, the pin by the part beyond the through hole 6c for example being used other etc. pressurize when moulding, just can be under the state that the first metal layer 4 and second metal level 5 are pressurizeed from both sides, utilize resin-formed body 6 and integrated.In this case, also be in crimping the part of pin etc. form pressurization perforate 6b.

(4) in the execution mode in front, mainly provide the example of the fuel cell of hydrogen supply-type, yet as fuel cell used among the present invention, so long as can utilize the fuel cell of fuel generating, no matter be which kind of can, for example can enumerate methyl alcohol modified version, directly methanol type, hydrocarbon supply-type etc.The fuel cell of also known various other fuel of use, no matter they adopt which kind of can.

Under this situation, use solid macromolecule electrolyte layer corresponding and electrode layer etc. with various fuel cells.For example, under the situation of direct methanol type, in general, infiltration (crossover) in order to suppress it, is preferably used the solid macromolecule electrolyte of aromatic series hydrocarbon system greatly in the Nafion system.In addition, catalyst preferably uses two kinds of mixing (Pt, Ru) in electrode layer.

(5) in the execution mode in front, provide according to the size of the exposed division that makes the first metal layer and/or second metal level and the size mode about equally of perforate and utilize resin-formed body and incorporate example, and in the present invention, also can be shown in Fig. 7 (a)～(b), by 1 big perforate 6a being set, thereby all or part of of a plurality of exposed divisions of the first metal layer 4 and/or second metal level 5 exposed in one side.

In addition, also can be by big perforate 6a more than 2 being set in one side, thereby make the first metal layer 4 and/or second metal level 5 a plurality of exposed divisions half or expose below it.That is to say, can come moulding according to the mode of from 1 perforate 6a, exposing the exposed division more than 2 among the present invention.

(6) in the execution mode in front, provide first conductive layer and second conductive layer by having the first metal layer that makes the exposed division that first electrode layer and the second electrode lay part expose and the example that second metal level constitutes, and in the present invention, also the conductive layer that does not have exposed division can be used as first conductive layer and/or second conductive layer.Under this situation, can use conductive layer with gas-premeable, gas diffusibility, as this kind conductive layer, for example can enumerate porous metallic layers, porous, electrically conductive macromolecule layer, conducting rubber layer, conducting fibre layer, conductivity paste, conductive coating paint etc.

(7) in the execution mode in front, provide the example that first electrode layer and the second electrode lay expose from the perforate of resin-formed body, and in the present invention, also can be between the perforate and first electrode layer or the second electrode lay of resin-formed body, folder is established porous layer.When folder is established porous layer,, set in advance porous layer in the outside of metal level or conductive layer and get final product as long as sandwich used in the insert moulding.It is bonding etc. that porous layer and metal level or conductive layer can carry out in advance, also can be laminated configuration.

As the material that forms porous layer, can enumerate the temperature in the time of can tolerating insert moulding perforated membrane, nonwoven fabrics, weave cotton cloth etc.

(8) in the execution mode in front, be given in the resin-formed body example that makes the perforate that first electrode layer and the second electrode lay expose to the outside is set, and in the present invention, also can be provided for the stream of supply gas or liquid in the inside of resin-formed body.Under this situation,, carry out foregoing insert moulding, just can in this stream, electrode layer be exposed by using the preform that is provided with stream at the inner face of a side that contacts with conductive layer.

Embodiment

Below, embodiment of representing formation of the present invention and effect particularly etc. is described.

Embodiment 1

With the copper coin of thick 0.2mm with shape shown in Figure 1 (opening diameter 2.0mm * 22 of the major diameter 31mm of oval portion, minor axis 10mm, protuberance) punching press and stamping-out is made 2 copper coins that become metal level.

In addition, the membrane electrode assembly (33mm * 12mm) make of shape shown in Figure 1 as followsly.Platinum catalyst has used U.S. Electrochem corporate system 20% to support the C catalyst (EC-20-PTC) of platinum.With this platinum catalyst and carbon black (the Ketjen black EC of Akuzo company), Kynoar (Kyner) respectively with the mixed of 75 weight %, 15 weight %, 10 weight %, with the ratio of dimethyl formamide with the Kynoar solution that forms 2.5 weight %, add in the mixture of above-mentioned platinum catalyst, carbon black, Kynoar, dissolving mixes in mortar, is made into the catalyst paste.Carbon paper (Toray makes TGP-H-90, thick 370 μ m) is cut into 33mm * 12mm, and the about 20mg of catalyst paste that makes as described above of the spatula coating is dry in 80 ℃ heated air circulation type drying machine thereon.Like this just be made into the carbon paper of the carbon monoxide-olefin polymeric that supports 4mg.The platinum loading is 0.6mg/cm ²

Use the carbon paper of the supported platinum catalyst of making as described above, as the Nafion film (E.I.Du Pont Company system Nafion112,33mm * 12mm, thick 50 μ m) of solid macromolecule electrolyte (cation-exchange membrane), metal pattern drop stamping 2 minutes under 135 ℃, the condition of 2MPa is used on its two sides.The membrane electrode assembly that so obtains is sandwiched in the central authorities of 2 above-mentioned copper coins, use metal pattern as shown in Figure 2, under the state of exert pressure from the both sides of 2 copper coins (1 ton), be disposed in the metal pattern.Under this state, resin ((strain) PrimePolymer system, acrylic resin, J-700GP) is injected (injection pressure 400kgf/cm in the mould down at 195 ℃ ²), after cooling, from metal pattern, take out, thereby the outside dimension that obtains resin-formed body is the thick fuel cell of 39mm * 18mm * 2.1mm.

Use this fuel cell, be installed on anode-side have the inner space and cathode side in the evaluation anchor clamps of atmosphere opening, the inner space by anode side was supplied with hydrogen with 12mL/ minute and is generated electricity, and estimated the battery behavior of this moment.Battery behavior is to use Dongyang Technicha system fuel cell evaluation system, determines the variation of output voltage when changing electric current.The change list of output voltage at this moment is shown among Fig. 6.Distinguish that according to this result and will utilize the fuel cell (comparative example 1) of sealed to compare between the metallic plate, output voltage improves about 20%.

Comparative example 1

In embodiment 1, replace copper coin and use gold-plated SUS plate, make its size than electrode big (cathode side 35mm * 14mm, anode-side 39mm * 18mm), the Nafion film is also than the big (39mm * 18mm) of carbon paper, establish the Nafion film and the mode that is not short-circuited according to folder, with utilizing crimping to seal around the SUS plate, in addition, make, estimated fuel cell in the same manner with embodiment 1.The change list of output voltage at this moment is shown among Fig. 6.

Symbol description

1 solid macromolecule electrolyte layer

2 first electrode layers

3 the second electrode lays

4 the first metal layers (first conductive layer)

4a perforate (exposed division)

5 second metal levels (second conductive layer)

5a perforate (exposed division)

6 resin-formed bodies

The 6a perforate

7 preforms

The 7a perforate

10 moulds

The 11a protuberance

The 12a protuberance

The C element cell

The L sandwich

The J connecting portion

Claims (according to the modification of the 19th of treaty)

1. (revise afterwards) a kind of fuel cell, first conductive layer and second conductive layer that possess the solid macromolecule electrolyte layer, be located at first electrode layer and the second electrode lay of these solid macromolecule electrolyte layer both sides and be disposed at the more lateral of these electrode layers respectively, use through the resin-formed body of insert moulding these layers integrated

Described first conductive layer constitutes the first metal layer of the exposed division that the described first electrode layer part exposes by having, and described second conductive layer constitutes second metal level of the exposed division that described the second electrode lay part exposes by having.

2. fuel cell according to claim 1, wherein, described resin-formed body has the supply unit that is used for to first electrode layer and the second electrode lay supply gas or liquid.

3. (deletion)

4. (revise afterwards) fuel cell according to claim 2, wherein, the supply unit of described resin-formed body is the perforate of being located at the position corresponding with the exposed division of the described the first metal layer or second metal level.

5. fuel cell according to claim 4, wherein, between the perforate and described first electrode layer or the second electrode lay of described resin-formed body, folder is established porous layer.

6. fuel cell, as element cell, a plurality of these element cells are integrated with described resin-formed body with the described fuel cell of claim 1.

7. fuel cell according to claim 6, wherein, a plurality of described element cells also are located in the identical face.

8. fuel cell according to claim 6 wherein, has the connecting portion that is electrically connected between the conductive layer with described a plurality of element cells, and this connecting portion is integrated with described resin-formed body.

9. fuel cell according to claim 8, wherein, first conductive layer of one in the adjacent described element cell, another person's second conductive layer and described connecting portion are formed by the metal level that continuous metallic plate constitutes.

10. (deletion)

11. the manufacture method of a fuel cell comprises following operation:

With solid macromolecule electrolyte layer, first electrode layer that is disposed at its both sides and the second electrode lay and be disposed at their outside and have the first metal layer that makes the exposed division that described first electrode layer and the second electrode lay part expose and the sandwich of second metal level is disposed at operation in the mould; And

With described the first metal layer and second metal level under the state of both sides pressurization, in this mould, inject resin, thereby forming device is useful on to the supply unit of first electrode layer and the second electrode lay supply gas or liquid and with the operation of the incorporate resin-formed body of described sandwich.

12. the manufacture method of fuel cell according to claim 11, wherein, the inner face of the mold component of having cut apart in that described mould is made segmenting structure is provided with protuberance, make this protuberance be crimped on the described the first metal layer or second metal level, in described mould, injecting resin under this state.

13. the manufacture method of fuel cell according to claim 12, wherein, surface at the described the first metal layer or second metal level is provided with a plurality of perforates, in the described mold component of having cut apart, a plurality of protuberances with upper surface more bigger than described perforate are set respectively in the position corresponding with described a plurality of perforates.

14. (revising the back) is according to the manufacture method of any described fuel cell in the claim 11～13, wherein, under the state that utilizes connecting portion to be electrically connected between the conductive layer with arbitrary sandwich and other sandwich, a plurality of described sandwichs are disposed in the mould.

Claims

1. fuel cell, first conductive layer and second conductive layer that possess the solid macromolecule electrolyte layer, be located at first electrode layer and the second electrode lay of these solid macromolecule electrolyte layer both sides and be disposed at the more lateral of these electrode layers are respectively used through the resin-formed body of insert moulding these layers integrated.

3. fuel cell according to claim 1 and 2, wherein, described first conductive layer constitutes the first metal layer of the exposed division that the described first electrode layer part exposes by having, and described second conductive layer constitutes second metal level of the exposed division that described the second electrode lay part exposes by having.

4. fuel cell according to claim 3, wherein, the supply unit of described resin-formed body is the perforate of being located at the position corresponding with the exposed division of the described the first metal layer or second metal level.

10. the manufacture method of a fuel cell comprises following operation:

Solid macromolecule electrolyte layer, first electrode layer that is disposed at its both sides and the second electrode lay and first conductive layer in the outside and the sandwich of second conductive layer that are disposed at them are disposed at operation in the mould; And

By injecting resin in this mould, thereby moulding is with the operation of the incorporate resin-formed body of described sandwich.

11. the manufacture method of a fuel cell comprises following operation:

14. manufacture method according to any described fuel cell in the claim 10～13, wherein, under the state that utilizes connecting portion to be electrically connected between the conductive layer with arbitrary sandwich and other sandwich, a plurality of described sandwichs are disposed in the mould.